Biggest tire on stock 18" rims, without lift

[midlifecrisis]

Stock tires are 265/65r18...can I fit 265/70r18 on the stock rims without lift? How about 265/75r18? Assume that wider tire (i.e. 270) would not fit on stock wheel but maybe this isn't true? What if I level only?

Basically just wanting to know how big I can go without getting new wheels, and with either no lift or just a level. I assume people on here have insight here. Thanks for the help!

 

[Jeff_]

I have a 275/70/18 on the stock wheels with Bilstein 5100 leveled. No Rubbing.